2 files changed, 2 insertions, 2 deletions
diff --git a/Makefile b/Makefile
index c534338f..b0d9684b 100644
--- a/Makefile
+++ b/Makefile
@@ -2,7 +2,7 @@ build:
 	cargo build --release
 
 format:
-	rustfmt src/*.rs
+	git ls-files | grep '\.rs$' | xargs -P 0 rustfmt
 
 lint:
 	cargo clippy
diff --git a/README.md b/README.md
index 738fb902..8b529085 100644
--- a/README.md
+++ b/README.md
@@ -230,7 +230,7 @@ Alternatively, delta is available in the following package managers:
   <tr>
     <td>Debian / Ubuntu</td>
     <td><br>.deb files are on the <a href="https://github.com/dandavison/delta/releases">releases</a> page and at <a href="https://github.com/barnumbirr/delta-debian/releases">barnumbirr/delta-debian</a><br>
-    <code>dpkg -i file.deb</code></td>
+    <code>dpkg -i file.deb</code>. **IMPORTANT** If you are using Ubuntu <= 19.10 or are mixing apt sources, read https://github.com/dandavison/delta/issues/504, be extremely cautious, and try the versions linked against musl.</td>
   </tr>
   <tr>
     <td>Fedora</td>